1165310226 has 80 divisors (see below), whose sum is σ = 2744280000. Its totient is φ = 368878752.

The previous prime is 1165310189. The next prime is 1165310231. The reversal of 1165310226 is 6220135611.

1165310226 is a `hidden beast` number, since 1 + 1 + 653 + 1 + 0 + 2 + 2 + 6 = 666.

1165310226 is a nontrivial binomial coefficient, being equal to C(48277, 2).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 1165310226.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 554125 + ... + 556223.

It is an arithmetic number, because the mean of its divisors is an integer number (34303500).

Almost surely, 2^1165310226 is an apocalyptic number.

1165310226 is the 48276-th triangular number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1165310226, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1372140000).

1165310226 is an abundant number, since it is smaller than the sum of its proper divisors (1578969774).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1165310226 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (1165310225) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (2276).

1165310226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2285 (or 2276 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1165310226 is about 34136.6405201215. The cubic root of 1165310226 is about 1052.3184524834.

Adding to 1165310226 its reverse (6220135611), we get a palindrome (7385445837).

The spelling of 1165310226 in words is "one billion, one hundred sixty-five million, three hundred ten thousand, two hundred twenty-six".